Furnace.



A. WARDZINSKI.

FUBNAOE. APPLIOATI H rum) we. 27, 1901.

909,488. Patented Jan. 12,1909.

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ANTON WARDZINSKI, OF BROMBERG, GERMANY.

FURNACE Specification of Letters Patent.

Application filed August 27, 1907.

Patentedfian. 12, 1909.

Serial No. 390,286.

To all whom it may concern:

Be it known that I, ANTON WARnzINsKI, a subject of the German Emperor, and a resident of Bromberg, in the German Empire, have invented new and useful Improvements in Furnaces, of which the following is a specification.

This invention relates to improvements in a smoke consuming furnace for boilers and the like of that type in which heated or heat storing bodies are arranged and disposed behind the firebridge so as to be heated by the products of combustion. l Jith such devices when the furnace door is opened for the introduction of a fresh charge of fuel the cold air which enters the furnace and the fire gases which are cooled by such air are heated by the heat storing body with the result that the formation of soot is revented and complete combustion takes p ace.

According to my present invention the heat storing body which is placed just behind the firebridge is in the form of a truncated cone of refractory material axially perforated with a central passage and pointing in the di rection of travel of the fire gases. The central passage is in a horizontal plane and the cone is so placed relatively to the firebridge that the lower edge of the central passage is about level with the upper edge of the firebridge. In line with the cone indicated is a second cone placed further along the flue and also pointing in the direction of travel of the fire gases.

In the firebridge is an air passage for heated air from the ashpit to enter the fine, and this air passage may be controlled from the furnace door.

In the accompanying drawings Figure 1 illustrates in vertical longitudinal section a boiler furnace and part of a fiue. Fig. 2 is a view in elevation of the base of the refractory cone which is placed next to the firebridge.

Referring to the drawings, a indicates the firehars of the furnace and b the firebridge. Placed in the line behind the firebridge is a cone 0 of refractory material disposed horizontally and having its base presented to the firebridge. This cone is centrally axially perforated as at d and its base is formed or provided with ribs e, which may be disposed tangentially to the central perforation or in any other way which will have the efiect of securing a thorough admixture of the fire gases impinging on the base with hot air which also impinges on the base and is admitted from the ashpit through the opening in the firebridge which is controlled by the damper i.

As will be seen the cone 0 is so laced in its support 9 that the lower edge 0 its central perforation is about level with the upper edge of the firebridge.

The door or damper '2', may be mani ulated by hand to admit air when desired, ut it is preferred to connect it to the furnace door m by means of a rod 75 in such a manner that when the door is opened (as for the addition of a fresh charge of fuel) the damper is also opened and heated air passes through the firebridge. Connected to the rods levers or the like by means of which the motion of the door m is communicated to the damper i, may be an oil pump, dash pot, clock or other well known device commonly used for such a )urpose, to check or control the period at which the damper closes after the furnace door is closed.

with the damper i opened as indicated at the time when fresh fuel is being added, heated air is admitted and mixed with the large and comparatively cool quantities of gases then generated and arriving from the fire. This mixture is heated by contact with the heated cone 0 and complete combustion finally takes place.

Behind the first perforated cone as already described there is, as illustrated in the draw ings, a second solid cone f arranged in such a manner that its base receives the gases which pass through the central perforation in the first cone.

Air is fed in through the channel it of the fire-bridge. through the hole (Z of the cone 0 and another part passes the spaces existing around the first cone. Both parts of air impinge against the second cone. It is clear that the highest efiicacy of the second cone de ends upon the condition that the two cones lie spaced from each other so that the second cone may be of use in heating the air that does not pass through the perforation.

More than two cones may be used, the third being disposed in relation to the second as the second is to the first and so on through the series.

When more than two cones are used, the second or other cone may also be perforated.

One part of the air streams .1

1. The combination in a furnace of a firebridge having an opening communicating with the ash it, a perforated cone of refractory materia placed behind the bridge and with its base presented thereto, and a second cone placed in extension of the first and with base presented thereto, substantially as herein described.

2. The combination in a furnace of a firebridge formed with an opening communicating with the ashpit, a'damper for such opening, means by which themovenient of the damper'is'oontrolled from the furnace door, a perforated cone of refractory material placed behind the bridge and with its base resented thereto, and a second cone placed in extension of the first and with its base prescribed.

3. The cooperative combination in a furnace, of a firebridge having an air opening 7 therethrough leading from the ashpit and a erforated cone of refractory material placed behind such firebridge and having a base provided with mixing ribs presented to such firebridge, substantially as hereinbefore described.

In witness whereof I have hereunto set my hand in the presence of two subscribing witnesses.

ANTON WARDZINSKI.

Witnesses HENRY HAsPER, WOLDEMAR HAUP'r. 

